Rafi Hecht I’m surprised you’re asking considering you have a website devoted to techeiles. You seem to be holding.
In any event HaRav Shlomo Miller wrote that one reason not to wear techeiles today is that there’s a chashash Bal tosif since according to the Rambam only one string should have techeiles. If someone only put on one string then it’s Bal Tigra according to other Rishonim. I mamash don’t get it though since the Mishnah Berurah already paskened like Rashi and Tosafos to have four strings of techeiles…